The Šum Waterfall (sometimes called Nemiljski Šum) is a very nice 25-metre high waterfall on the Radovna River, which you can find at the end of the Vintgar Gorge.
There is a small lake below the waterfall, which you can use for swimming on hot summer days.
The Šum waterfall is about 2 kilometres from the village of Blejská Dobrava or 5 kilometres from the town of Jesenice.